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Every 15,000 miles
(24,000 km)
Replace cabin air filter (if equipped)
Every 30,000 miles
(48,000 km)
Replace climate-controlled seat filter (if equipped)
Replace engine air filter
Replace fuel filter (Ranger)
Every 37,500 miles
(60,000 km)
Inspect valve clearances; adjust as necessary
(Transit Connect CNG vehicles)
Every 60,000 miles
(96,000 km)
Change automatic transmission fluid and filter on
5–speed TorqShift transmission; consult dealer for
requirements.
Replace front wheel bearing grease/grease seal if
non-sealed bearings are used (2WD vehicles)
Every 105,000 miles
(168,000 km)
Change engine coolant
1
Change manual transmission fluid (except Escape)
Change rear axle fluid (Dana axles)
Replace spark plugs
Inspect accessory drive belt(s)
2
Every 150,000 miles
(240,000 km)
Change automatic transmission fluid and filter
(except 5–speed TorqShift transmission) (filter
not required on 6F35, 6F50, DPS6 and AWF-21
transmissions); consult dealer for requirements.
Change front axle fluid (4WD vehicles)
Change manual transmission fluid (Escape)
Change rear axle fluid (RWD vehicles)
Change transfer case fluid (4WD vehicles)
Replace accessory drive belt(s) if not replaced
within the last 100,000 miles (160,000 km)
Replace front wheel bearings and seals if
non-sealed bearings are used (2WD vehicles)
1
Initial replacement at 105,000 miles (160,000 km) or 72 months; every
45,000 miles (72,000 km) or 36 months thereafter
2
Perform a follow-up inspection at 120,000 miles (192,000 km)
Scheduled Maintenance Guide
351
2011 Navigator (nav)
Owners Guide, 1st Printing
USA (fus)